Are you looking for playing card games with the standard deck of 52, or other games as well?
Rook uses a custom deck with 57 cards, four colored suits of 1-14 plus a wild Rook, but versions using it are fairly similar to many traditional acts games with standard playing cards.
Phase 10 is a rummy-like game with a deck of 4 colored suits from 1-12, 2 copies of each number for 96 total cards, plus 8 wild cards and 4 skip cards.
Pinochle might be a challenging game to program since it has more complex points and tracking systems while still using standard cards. No new art required.
Great, thanks! Yeah the main constraint is art because I filled the 64 available characters in the extended colour mode already so different number of cards is fine so long as I don't have to draw tarot/pokymenz :D